Vaporizer



Patented July 7, 1942 UNITED STATES FATE ()FF'I CE 2,289,204" vAPoaIz'ER' Nathaniel B. Milton, Chicago, Ill. Application October 30, 1941;Srial No. 417,135"

1 Claim.

This invention relates generally to Vaporizers and more particularlyto a device adapted for the vaporizing of chemicals used in fumigating, exterminating or deodorizing.

The primary object of the'invention is to provide a device of the character described which will be extremely economical and rugged in construction and which will comprise a minimum of parts.

A further object of the present invention is to provide a new and improved construction for the vertical boiler of a vaporizer of the character described whereby the water in the boiler will be heated quickly and efiiciently.

A still further object of the invention lies in the provision of a new and improved construction for a vaporizer having a vertically arranged cylindrical boiler which includes novel heating means for the boiler.

A still further object of this invention is to provide a construction for a vaporizer whereby same may be easily and readily dissembled and re-assembled. I v

A still further object of the invention is to provide a novel device ofthe character described including a novel vaporizing nozzle and siphoning device.

With the foregoing and other objects in view which will appear as the description proceeds,

the invention consists of certain novel features of construction, arrangement and combination of parts hereinafter fully described, illustrated in the accompanying drawing, and particularly pointed out in the appended claim, it being understood that various changes in the form, proportion, size and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

For the purpose of facilitating an understand: ing of my invention, I have illustrated in the accompanying drawing a preferred embodiment thereof, from an inspection of which, when considered in connection with the following description, my invention, its mode of construction, assembly and operation, and many of its advantages should be readily understood and appreciated.

Referring to the drawing in which the same characters of reference are employed to indicate corresponding or similar parts throughout the several figures of the drawing:

Fig. 1 is a sectional view taken through a vaporizer showing my invention.

Fig. 2 is a fragmentary sizeelevational view of the vaporizer.

Fig. 3 is a cross-sectional view taken through the'vaporizer along the line 3 3 of Fig. 1.

Referring" now to the specific details of the device, the reference'character Iii designates generally' the boiler of the device. The boiler is cylindrical in shape and is vertically arranged as shown. The upper portion of the boiler i0 is provided atthe' side thereof with a handle ll attached to'bosse's [2, cast integrally with the body of the boiler I0, by means of screws I3 or the like, whereby the vaporizer may be carried from pl'ace'to'place. The handle II is, of course,

'made from wood or someother heat insulating material.

The upper wall Hl'of the boiler is provided with a boss I5 which is tapped for the reception of a screw threaded plug member 16 having shoulder I! adapted to rest 'on the face of the boss 15. A waterproof gasket I8 is interposed between the shoulder 11 and the boss l5. The plug has a hexagonal portion l9 whereby same may be easily removed from or screwed into the boss [5. The primary purpose of the plug [6 is to permit the introduction of Water into the boiler ID. The water level is read by'means of a water gage l9 installed at the sidef of the boiler.

The plug lBis hollow and is provided with a simple blow-off mechanism comprising a headed screw 2!] which is urged downward into the core of the plug member l6'by means of the coil spring 2| surrounding said screw 20 and held in position by the nut 22 urging same against the shoulder 23 provided in the interior of the plug member. The head of the screw 20 fits into a countersunk end "of the hollow passageway 24 in the plug it andthe spring 2| and nut 22 are' accommodated in the passageway 25 which is of larger diameter than the passagewayZd;

When the steam pressure" in the interior of the boiler H] becomes prohibitive, the head of the screw 2E1'wil1 be forced outward against the compression of the spring 22 thereby relieving the pressure. By screwing the nut 22 up or down on the screw 2%], the tension of the spring 23 may be varied.

Approximately the bottom half of the boiler I0 is of reduced outer diameter as shown at 26. By reason of the reduction in diameter, a shoulder 2? is provided on the outer wall of the boiler.

Over the reduced diameter portion I have provided a rectangular heating unit 28 which is curled to a sleeve-like formation which substantially encircles the reduced diameter portion.

One side of the boiler I is flattened or cut away to produce the portion 29. The edges of the heating unit 28 come up to the edges of the fiattened portion 29. The heating unit 28 is held in place upon the reduced diameter portion 25 by means of a large metal clamping member 38 which has its free ends 3| disposed upon the flattened portion 29 and provided with the usual ears 32 adapted to be drawn together by the screw means 33 in clamping engagement.

The boiler may be cast from any suitable metal, but I prefer aluminum because of its light weight and its heat conducting properties. The heating unit 28, as has been explained above, practically completely surrounds the lower half of the boiler and is in a position to supply maximum heat thereto readily and evenly on all sides.

A skirt member 34 is provided surrounding the heating unit and concealing same and enhancing the outer appearance of the vaporizer thereby. The skirt member 34 consists of a metal sleeve having its upper end spun inward as shown at 35 and adapted to be seated in the recess 36 and held therein by the screws 37 so that the end 35 is flush with the outer diameter of the upper portion of the boiler It. The bottom edge of the sleeve 34 is spun outward at 38 to accommodate the insert 39 which closes off the bottom of the sleeve 35. The insert is provided with a flange 4!! which is held to the edge 38 interiorly thereof by means of screws 4| or the like.

The insert 3% has a plurality of feet 32 attached thereto to permit standing the vaporizer in an upright position. It is desirable that the feet be made of heat insulating material.

The sleeve 34 is provided at one side thereof with an opening through which the leads from the heater unit 28 may pass and said opening is provided with an insert of insulating material in the usual manner. The broken line outline of the insert may be seen at 43 in Fig. 1.

The interior of the sleeve 34 is preferably lined with some heat insulating material, such as asbestos, as shown at 44 to prevent outward transfer of heat. It will be noted that a chamber 45 is formed between the bottom 46 of the boiler I0 and the insert 39. This chamber may accommodate switches, thermostats, pilot lights, and the like which are not shown for the sake of clarity.

The upper portion of the boiler is provided with a boss 4'! along an edge of the upper wall it of the boiler adapted to receive therein the screw threaded end of a vaporizing nozzle 58. The nozzle comprises a tube 49 inserted into the boss at an angle of approximately 45 and provided at its outer end with a cap 513 having a restricted opening An L-shaped bracket 52 is brazed or in other manner attached to the tube 49 and is provided on its free leg with an enlarged portion 53 adapted to mount the siphon tube 56. The siphon tube projects through a vertically arranged perforation provided therefor in the enlarged portion 53 and said tube 54 can be slidably moved up or down for adjusting the distance between its opening 55 and the opening 5| of the nozzle 48. A set screw 56 is provided for fixing the tube 54 in any desired position.

The bottom of the tube is adapted to dip into a vessel 5! containing some fumigating or deodorizing liquid which it is desired to vaporize. I have shown a bottle 57 of such liquid, the neck 58 of which is held by the clamp member 59 which is fixedly attached to the side of the boiler it. For this attachment I provide a boss 68 integrally cast with the boiler and adapted to have the attaching screws Bl fastened thereto. The construction of the clamp member 59 is simple and well known.

In operation the boiler heats water contained therein by reason of the heater 28 being associated therewith, and causes the formation of steam therein above the water. The steam is extravasated through the restricted opening of the nozzle 68 under great pressure and the passage of steam across the opening 55 siphons the liquid up through the tube 54 and causes same to join the extravasated steam. The liquid is, of course, atomized and because of the high temperature of the steam it is also volatilized causing a vapor of steam, and liquid to fill the atmosphere.

The vaporizer is intended to be used for the furnigating of rooms, the extermination of insects, and the deodorizing of clothes, furs, and the like, but it is equally adaptable to any kind of process or the like, where vaporization of a volatile or semi-volatile substance is desired.

It is believed that my invention, its mode of construction and assembly, and many of its advantages should be readily understood from the foregoing without further description, and it should also be manifest that while a preferred embodiment of the invention has been shown and described for illustrative purposes, the structural details are nevertheless capable of wide variation within the purview of my invention as defined in the appended claim.

What I claim and desire to secure by Letters Patent of the United States is:

Heating means for a vertical cylindrical boiler vaporizer comprising a relatively thin rectangular removable electrical heating element curled about the bottom of the boiler, the ends of said element being spaced one from the other, that portion of the boiler between said ends being flattened, a clamp member overlying said heating element holding same tightly to the surface of the boiler and having the fastening means thereof disposed at the flattened portion of the boiler whereby a cylindrical sleeve member may be disposed over said element and clamp member without presenting any protuberances upon the surface of the vaporizer.

NATHANIEL B. MILTON. 

